Improvement in roller crush ing--machi nes



Nrren STATES `HEvy n wie a ALONZC HITCHCOCK, CF .NEW`ZYCRK, N. Y.

EMPRVEMENT EN PlOl...l..El'%v CRUSHlNG-JWACHlNES.'

Specification rorming part of Letters Patent No. 50,24?, dated October 3, 1865; antedated September 23,1865.

To all 'whom 'it may concern.-

Be it known that I, ALon-zoHrrcHcooK,

l ot New York, in the county and State of New and I do hereby declare that the following is a full, clear, and exact description of' the same, reference being had to the aceompan yin g drawing, making a part of this specitication, and to the letters of reference marked thereon.

y My invention relates to machines that are used to crush or reducequartz or other min'- eral substance after it has already received some mechanical preparation, and it constitutes an improvement on what are ordinarily styled the Cornish rollers.

.v It consists ot' the combination of a `large roller with twoor more small rollers, thatare made in a peculiar way, to admit of 'an easy ladjustment in compensation for their wear',

and which are not connected with the large roller by gearing, and are each driven by iudcpendent means from the motive power. The machine is placed to receive the material from the machine in which it is primarily prepared by beingjbroken .into moderately-sized lumps,

and after passing it, in conjunction with `a co-` pious stream of water,.between the large roller and the small ones in succession, so that the fragments are progressively broke-n smaller and smaller as they are crushed and ground through the narrower spaces of the succeeding small rollers and the large one,it is finally 4delivered to the action of a pulverizing-mill, by which its preparation for an amalgamator may be completed. The working-surfaces of the rollers'are composed of Franklinite iron or ot'. 'any other hard material orcomposition to resist wear', and the 'small rollers are divided transversely, so that when they become worn in the middle, as ordinarily occurs, thc two sections composing a roller maybe transposed ifo/,change the parts that formed the middle to the ends of the roller. The sections may be keyedto their shafts or securedfin any otherV manner, and the rollers may be supplied with ily-wheels, and with spring or counterbalancehearings that will yield to` any undue strain, in the ordinary manner known' to mechanics.

"I'o enable others skilled in the arts to which it appertains to make and use' my invention,

ers, but it may be done, if desirable.

which it is bolted to the disks orhubs b on the y shaft c. As this roller is made'of very large diameter the wea-r ofthe surface is not sulficient to make it necessary to provide for the inequality of its wearing, as in the small roll- The small rollers d e are each cast in two lengths or sections that may be changed in positions ou their shafts, so thatthe parts at themiddles of the rollers may be placed at the ends. The lower roller of the lsmall ones is placed nearer to the large roller than i'sfthe upper one; and

when a series of more than Atwo small rollers is employed their respective distancesl from the large one are gradually diminished, so that each one of the 'series may perform its proportion' ot' the work in prgressively reducing' the stuft under operation.v The pipegsupplieswater to 'the material When Iirst delivered tothe machine, and accompanies it in its passage be-` tween the rollers.

The frame of the machine and the-iiy-wlreels and yieldingbearings of therol'lers may be constructed in theordinary manner, or in any other Way that rpermits the arrangement and construction ot' -the rollers herein descrbed.

It will he seen from the foregoing description that the action of the large roller, being distributed over a' comparatively extended surface, will cause itvto wear very slowly, and

that the ends and'middles of the small rollers may be transposed to compensate vfor any inequality in their wearl andjnihat, ot'.- the large roller, and that when the sections have been changed oir-the same roller and with others ondierent rollers as often as may he necesi sary and practicable, and until they have oe-- cometoo small to be longer retained,they may be replaced with new ones and the machine kept in eiicient operation without -involving large expenses for transportation from the place of manufacture. The small rollers are set in relation to the large one, and to each other in such a manner that the material and water pass progressively from one to the other; and the entire machine may be combined with a breaker and a pul'verizing-mill' or amalgamator, to form a. series through which thc mate The construction .of the rollers in reversible :rial may pass withontassistance from manual half lengths or sections, substantially in the labor. Tlle'rollers mziy beriven by connected manner described.

gearing' nt it is pre erre to drive them sep- Tf f x amtelyand by independent means, so that ALOO HIMHQQCK' there may be no interference in their action. Witnesses I claim as my invention and. desire to secure DUNHAM J. GRAIN,

by Letters Patent- WM. KEMBLE HALL. 

